Abstract
The paper provides a reconstruction of the notion of material Apriori while exhibiting the anti-Kantian inspiration and factual grounding thereof. The attempt is made to show that a non-formal Apriori obtains because the sensuous has a normative character; further, that the difference between material and formal eidetic laws is rooted in the difference between sensuous contents, given in experience, and intellectual contents, originating in activities of judgement. The material Apriori is not independent of all experience, since it is grounded on sensuous eidetic contents and thus depends on the latter’s givenness and characteristics. It is thanks precisely to this ,contingency‘ that it has an ontological significance